package com.treasure.service.commonutil;

import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import javax.imageio.ImageIO;
import javax.net.ssl.HttpsURLConnection;
import javax.swing.filechooser.FileSystemView;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.treasure.service.commons.lang.util.PicUtil;
import com.treasure.service.commons.lang.util.StringUtil;
import com.treasure.service.constant.GlobalConstant;
import com.treasure.service.enums.RedisKeys;

/** 
* @ClassName    : QrCodeUtil 
* @author       : panxingwu 
* @date         : 2018年11月18日 下午8:25:34 
* @Description  : 生成二维码
*/
public class QrCodeUtil {
	public static void main(String[] args) {
        String url = "http://www.baidu.com";
        String path = FileSystemView.getFileSystemView().getHomeDirectory() + File.separator + "testQrcode";
        String fileName = "temp.jpg";
        createQrCode(url, path, fileName);
    }

    public static String createQrCode(String url, String path, String fileName) {
        try {
            Map<EncodeHintType, String> hints = new HashMap<>();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 100, 400, hints);
            File file = new File(path, fileName);
            if (file.exists() || ((file.getParentFile().exists() || file.getParentFile().mkdirs()) && file.createNewFile())) {
                writeToFile(bitMatrix, "jpg", file);
                System.out.println("搞定：" + file);
            }
 
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    /** 
    * @Title      :writeToFile 
    * @param      :@param matrix
    * @param      :@param format
    * @param      :@param file
    * @param      :@throws IOException 
    * @return     :void 
    * @Description:保存文件
    */
    static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
    	BufferedImage image = toBufferedImage(matrix);
    	if (!ImageIO.write(image, format, file)) {
    		throw new IOException("Could not write an image of format " + format + " to " + file);
    	}
    }
    static BufferedImage getBufferedImage(BitMatrix matrix, String format, File file) throws IOException {
    	BufferedImage image = toBufferedImage(matrix);
        return image;
    }
    /** 
    * @Title      :createQrCodeBuffer 
    * @param      :@param url
    * @param      :@param path
    * @param      :@param fileName
    * @param      :@return 
    * @return     :BufferedImage 
    * @Description:生成二维码图片
    */
    public static BufferedImage createQrCodeBuffer(String url,String fileName) {
    	try {
    		String path = FileSystemView.getFileSystemView().getHomeDirectory() + File.separator + "testQrcode";
    		Map<EncodeHintType, String> hints = new HashMap<>();
    		hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
    		BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 400, 400, hints);
    		File file = new File(path, fileName);
    		if (file.exists() || ((file.getParentFile().exists() || file.getParentFile().mkdirs()) && file.createNewFile())) {
    			return getBufferedImage(bitMatrix, "jpg", file);
    		}
    	} catch (Exception e) {
    		e.printStackTrace();
    	}
    	return null;
    }
 
 
    static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, stream)) {
            throw new IOException("Could not write an image of format " + format);
        }
    }
 
    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;
 
    private static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
            }
        }
        return image;
    }

}
